"Where did everything come from?" This is a big question, so it is only fitting that the answer is found in the Big History Project. This free online course, designed for high school students, takes learners on a journey through "13.7 billion years of history." With so much ground to cover, the course divides its contents into five chapters: The Universe, Our Solar System and Earth, Life, Humans, and The Future. Embedded videos, quizzes, and activities keep students engaged along the way. While registration is not required to access the course materials, creating a free account does allow users to "take quizzes, track your progress, and earn badges." Plus, instructors can provide their students with a unique access code to keep track of each student's progress. The course is recommended for social studies classrooms, and teachers can join more than 1,000 of their peers who have already implemented the curriculum. Big History Project is a collaboration between Bill Gates and Professor David Christian (from Macquarie University), with additional support from educators and scientists. Readers should note the website is currently migrating to a new platform (accessible via the Go to School Site box at the top of the page); and, as a bonus, educators can also access Big History Project's sister project, World History Project, at this link.